Numerical analysis of acoustic characters in near field and self-noise of ship

Numerical analysis of acoustic characters in near field and self-noise of ship is studied by using structural FEM software NASTRAN and acoustic BEM software SYSNOISE. First, the vibration response characters are computed based on the 3-D FE model of ship, then taken the vibration characters of the ship as boundary conditions, a 3-D acoustic BE model is constructed and the influence of point sound source is also taken into account. At last the acoustic characters of the ship in near field are calculated by using indirect BEM. The computed results are compared with the experimental results, and it shows the effectiveness of the proposed method.